Hi masters, I need your help.
I am working on Lenovo Legion 16ITHg6
Motherboard number NM-D721, no BV, no schematic but I am attaching very closes ones.
INPORTANT: My motherboard version is with IT8258 IC, that is controlling keyboard and RGB LEDs.
My problem is on UI142, +3VALW_AG is not stable, floating from 0V to 3,3V.
AGKB_PWR_EN_N signal is floating too (that is why+3VALW_AG not stable).
Power LED is not working as well, power button working well.
UI26 ??? is there any firmware too? Powered by +3VALW_AG.
Motherboard has been refurbished year ago under warranty, I can seen soldering on both BIOS chips and PCH was replaced too, for sure!
What I already did:
reflashed both BIOSES (now flashed back original one)
replaced UI142
replaced SIO (reflashed with SVOD, tried to flash many files, leave it empty and system flashed it itself at first start)
replaced IT8258, there was problems to flash it, beause it is powered by +3VALW_AG, but finally flash was succesfull.
If I remember right, when I lift +3VALW_AG leg of UI142 was floating too, not sure, I can check it again in the morning.
Unit is working, instead of keyboard and lights.
I am on end of ideas, any help really appreciated.
I am working on Lenovo Legion 16ITHg6
Motherboard number NM-D721, no BV, no schematic but I am attaching very closes ones.
INPORTANT: My motherboard version is with IT8258 IC, that is controlling keyboard and RGB LEDs.
My problem is on UI142, +3VALW_AG is not stable, floating from 0V to 3,3V.
AGKB_PWR_EN_N signal is floating too (that is why+3VALW_AG not stable).
Power LED is not working as well, power button working well.
UI26 ??? is there any firmware too? Powered by +3VALW_AG.
Motherboard has been refurbished year ago under warranty, I can seen soldering on both BIOS chips and PCH was replaced too, for sure!
What I already did:
reflashed both BIOSES (now flashed back original one)
replaced UI142
replaced SIO (reflashed with SVOD, tried to flash many files, leave it empty and system flashed it itself at first start)
replaced IT8258, there was problems to flash it, beause it is powered by +3VALW_AG, but finally flash was succesfull.
If I remember right, when I lift +3VALW_AG leg of UI142 was floating too, not sure, I can check it again in the morning.
Unit is working, instead of keyboard and lights.
I am on end of ideas, any help really appreciated.
